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What makes a keychain item unique (in iOS)?
...kSecClassCertificate.
As each keychain item belongs to a keychain access group, it feels like the keychain access group (field kSecAttrAccessGroup) is an added field to all these primary keys.
share
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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...uery implicitly generates a temporary table, for instance while sorting or GROUP BY, this can use a lot of memory. If you use a lot of VARCHAR(255) fields for data that doesn't need to be that long, this can make the temporary table very large.
You may also like to know that this "padding out" b...
Improving bulk insert performance in Entity framework [duplicate]
...le>.*) AS");
var match = regex.Match(sql);
return match.Groups["table"].Value;
}
private object GetPropertyValue(object o)
{
if (o == null)
return DBNull.Value;
return o;
}
private Dictionary<string, string> GetMappings(Metad...
Spring MVC: How to perform validation?
...message() default "{YourCustomObjectValid.message}";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
public class YourCustomObjectValidator implements ConstraintValidator<YourCustomObjectValid, YourCustomObject> {
@Override
pub...
Solving “Who owns the Zebra” programmatically?
...ef solve(variables=variables, problem=problem):
from itertools import groupby
from operator import itemgetter
# find & print solutions
for solution in problem.getSolutionIter():
for key, group in groupby(sorted(solution.iteritems(), key=itemgetter(1)), key=itemgetter(...
How do I give text or an image a transparent background using CSS?
...xamples were written with intentional line breaks and spacing to logically group pieces that should be understood together by the reader— e.g. most width: & height: properties share a line because they're the same type of construct and better understood as a 2-dimensional shape, not a pair of ...
When to use , tag files, composite components and/or custom components?
...)
Facelet tag files
Use Facelet tag files if you want to have a reuseable group of components in order to prevent/minimize code duplication. E.g. a group of label+input+message components. The major difference with composite components is that the output of a Facelet tag file does not represent a s...
How to structure a express.js application?
...route, especially as the file gets bigger. As such, I found it helpful to group and centralize all my app.use() on a ./routes/index.js file.
In the end, my app.js will look something like this:
...
const express = require('express');
const app = express();
...
require('./routes/index')(app);
...
Should 'using' directives be inside or outside the namespace?
... (Not true for using statements but those are something quite different.)" groups.google.com/group/wpf-disciples/msg/781738deb0a15c46
– Chris McKee
Aug 24 '11 at 21:52
...
Evaluating a mathematical expression in a string
...t division
from pyparsing import (Literal, CaselessLiteral, Word, Combine, Group, Optional,
ZeroOrMore, Forward, nums, alphas, oneOf)
import math
import operator
__author__ = 'Paul McGuire'
__version__ = '$Revision: 0.0 $'
__date__ = '$Date: 2009-03-20 $'
__source__ = '''http...